Home > Research > Publications & Outputs > Mechanism-based modeling of thermal and irradia...

Electronic data

  • TMC_IRC_HT9_R2

    Rights statement: This is the author’s version of a work that was accepted for publication in International Journal of Plasticity. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Plasticity, 126, 2020 DOI: 10.1016/j.ijplas.2019.11.012

    Accepted author manuscript, 656 KB, PDF document

    Available under license: CC BY-NC-ND

Links

Text available via DOI:

View graph of relations

Mechanism-based modeling of thermal and irradiation creep behavior: An application to ferritic/martensitic HT9 steel

Research output: Contribution to journalJournal article

Published
  • W. Wen
  • A. Kohnert
  • M. Arul Kumar
  • L. Capolungo
  • C.N. Tomé
Close
Article number102633
<mark>Journal publication date</mark>31/03/2020
<mark>Journal</mark>International Journal of Plasticity
Volume126
Number of pages12
Publication StatusPublished
Early online date28/11/19
<mark>Original language</mark>English

Abstract

In this work, the creep behavior of HT9 steel in both thermal and irradiation environments is predicted using an integrated modeling framework. Multiple physical mechanisms such as diffusional creep and dislocation climb are incorporated into crystal plasticity calculations using the Visco-Plastic Self-Consistent (VPSC) approach. Climb velocities are informed by mean field rate theory laws in place of empirical power law formulations. More interestingly, the climb velocities explicitly consider the contribution of irradiation-induced point defects, i.e., stress induced preferential absorption (SIPA) effect. The developed expressions are shown to apply under conventional thermal creep and to the more complex irradiation conditions as well. This physically-informed, mechanism-based model is used to simulate the creep strain evolution of HT9 pressurized tubes under various loading conditions. It is demonstrated that the experimental behavior of this material reported in the literature is well described by this theoretical framework. The role of each relevant mechanism is discussed.

Bibliographic note

This is the author’s version of a work that was accepted for publication in International Journal of Plasticity. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Plasticity, 126, 2020 DOI: 10.1016/j.ijplas.2019.11.012